Dopant-Free Ultra-Thin Spiro-OMeTAD Enables Near 30%-Efficient n-i-p Perovskite/Silicon Tandem Solar CellsOA
A major challenge for n-i-p structured perovskite/silicon tandem solar cells(TSCs)is the use of 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene(spiro-OMe TAD),a commonly used hole transport layer,which induces significant optical losses and consequently reduces device current.Herein,we propose an ultra-thin(10 nm)vacuum thermal evaporation(VTE)-deposited spiro-OMe TAD,coupled with a 2D/3D perovskite heterojunction,to simultaneously enhance the optical and electrical properties of n-i-p perovskite/silicon TSCs.Our results demonstrate that the 10-nm-thick spiro-OMe TAD layer significantly improves optical performance,achieving a 92.2% reduction in parasitic absorption and an 18.4%decrease in reflection losses.Additionally,the incorporation of the 2D/3D perovskite heterojunction facilitates improved molecular arrangement and enhanced surface uniformity of the ultrathin spiro-OMe TAD,leading to higher tolerance to interface defects and more efficient hole extraction.Consequently,n-i-p perovskite/silicon TSCs featuring ultrathin spiro-OMe TAD exhibit remarkable efficiencies of 29.73%(0.135 cm^(2))and 28.77%(28.25% certified efficiency,1.012 cm^(2)),along with improved stability.
Xiangying Xue;Weichuang Yang;Zhiqin Ying;Fangfang Cao;Yuheng Zeng;Zhenhai Yang;Xi Yang;Jichun Ye
Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences(CAS),Ningbo 315201,People’s Republic of ChinaZhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences(CAS),Ningbo 315201,People’s Republic of ChinaZhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences(CAS),Ningbo 315201,People’s Republic of ChinaZhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences(CAS),Ningbo 315201,People’s Republic of ChinaZhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences(CAS),Ningbo 315201,People’s Republic of ChinaZhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences(CAS),Ningbo 315201,People’s Republic of China School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and Technology,Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of China,Soochow University,Suzhou 215006,People’s Republic of ChinaZhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences(CAS),Ningbo 315201,People’s Republic of China Research Center for Wide Bandgap Semiconductors and Devices,YongJiang Laboratory,Ningbo 315202,People’s Republic of ChinaZhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences(CAS),Ningbo 315201,People’s Republic of China Research Center for Wide Bandgap Semiconductors and Devices,YongJiang Laboratory,Ningbo 315202,People’s Republic of China
信息技术与安全科学
Perovskite/silicon tandem solar cellsHole transport layersOptical loss reductionOptical design
《Nano-Micro Letters》 2026 (4)
P.353-370,18
supported by the National Key Research and Development Program of China(Grant No.2024YFB3817304)the National Natural Science Foundation of China(Grant No.61874177)Zhejiang Provincial Natural Science Foundation of China(Grant No.LQN25F040009)Ningbo Natural Science Foundation(Grant No.2024J226)China Postdoctoral Science Foundation(Grant No.GZB20230787,2024M753344)Baima Lake Laboratory Joint Funds of the Zhejiang Provincial Natural Science Foundation of China(Grant No.LBMHD24E020002)Key Research and Development Program of Ningbo(Grant No.2023Z151)。
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